Cita APA (7th ed.)
Snow C. P. (1968). The sleep of reason. Charles scribner's sons.
Cita Chicago (17th ed.)
Snow C. P. The Sleep of Reason. New York: Charles scribner's sons, 1968.
Cita MLA (9th ed.)
Snow C. P. The Sleep of Reason. Charles scribner's sons, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.